两组的牙本质小管面积和相对面积有显著性差异（P<0.05）。

There were significant differences in both area and per area between two groups (P<0.05).

youdao

两组的牙本质小管面积和相对面积有显著性差异（P<0.05）。

There were significant differences in both area and per area between two groups (P<0.05).

youdao